I got an email from a tipster who said she had logged into Milesource only to find her account balance 3,000 points lower than the previous day. Member service told her that, according to their Terms of Service, her points had expired.
She didn’t realize that Milesource points expired. Neither did I, so I checked their FAQs and sure enough, it says that “AwardMiles expire two (2) years from the date that they are earned.”
If you’re a long-time Milesource member, you may want to check your account information to see if this has affected you or will be soon based on your earnings history.